W4XA
FORMER EXPERIMENTAL RADIO BROADCASTING STATION IN NASHVILLE, TENNESSEE
W4XA was an "experimental audio broadcasting station" operated by The National Life and Accident Insurance Company in Nashville, Tennessee from 1939 to 1940. It was part of a group of stations informally referred to as "Apex" stations, because it transmitted programming intended for the general public over what was then known as "ultra-high short-wave" frequencies.